/*
 * Copyright (C) 2012 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.gz.logistics.zxing.camera;

import android.hardware.Camera;
import android.util.Log;

public class OpenCameraInterface {

	private static final String TAG = OpenCameraInterface.class.getName();
	public static Camera open(int cameraId) {

		int numCameras = Camera.getNumberOfCameras();
		if (numCameras == 0) {
			return null;
		}
		boolean explicitRequest = cameraId >= 0;
		if (!explicitRequest) {
			int index = 0;
			while (index < numCameras) {
				Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
				Camera.getCameraInfo(index, cameraInfo);
				if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
					break;
				}
				index++;
			}
			cameraId = index;
		}
		Camera camera;
		if (cameraId < numCameras) {
			camera = Camera.open(cameraId);
		} else {
			if (explicitRequest) {
				camera = null;
			} else {
				camera = Camera.open(0);
			}
		}
		return camera;
	}
	public static Camera open() {
		return open(-1);
	}

}
